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The flame will surround the thermocouple just below the tip. A slight yellow flame may occur where the pilot flame and main burner flame meet. Figure 12 Warning: Never use needles, wires, or similar cylindrical objects to clean the pilot to avoid damaging the calibrated ruby that controls the gas flow. Figure 11 Oxygen Depletion Sensor Pilot (Figure 12) When the pilot has a large yellow tip flame, clean the Oxygen Depletion Sensor as follows: 1. Remove pilot from main burner assembly, see "Appliance Maintenance", Page 13. 2. Apply air pressure through the holes in the pilot indicated by the arrows in Figure 12. This will blow out foreign materials such as dust, lint and spider webs. THERMOSTAT OPERATION To ignite main burner, rotate gas control knob counterclockwise toward HI setting. To shut down main burner, rotate gas control knob clockwise toward LO setting. BF-10 The gas control has an input of 10,000 Btu/HR (2.9 KW/H). The hydraulic thermostat bulb is located at the casing assembly bottom. BF-20 The gas control modulates from a minimum input of 8,500 Btu/HR (2.5 KW/H) (LO setting) to a maximum input of 20,000 Btu/HR (5.9 KW/H) for LP gas (HI setting) or 18,000 Btu/HR (5.3 KW/H) for Natural Gas (HI setting). The hydraulic thermostat bulb which is located at the casing assembly bottom adjusts the main burner flame between minimum input and maximum input. BF-30 The gas control modulates from a minimum input of 8,500 Btu/HR (2.5 KW/H) (LO setting) to a maximum input of 30,000 Btu/HR (8.8 KW/H) (HI setting). The hydraulic thermostat bulb which is located at the casing assembly bottom adjusts the main burner flame between minimum input and maximum input. Note: When the hydraulic thermostat bulb is "satisfied" the main burner flame will shut "OFF" with the pilot flame remaining "ON". The LO and HI setting has temperature range of approximately 55°F (12.78°C)to90°F(32.22°C),respectively. Thisisthetemperatureat the hydraulic thermostat bulb not the room temperature. The owner is advised to determine the particular heat setting that is desired for comfort, as heating requirements are different for every owner. Attention: If the owner does not want the main burner to ignite and turns the gas control knob to the Lo setting, the main burner will still ignite if the temperature at the hydraulic thermostat bulb drops to 55°F (12.78°C). If no heat is desired, turn the gas control knob to the PILOT position. Page 12 16943-5-0806 APPLIANCE MAINTENANCE Glass Removal, Cleaning and Glass Replacement 1. Remove chrome grill from reflector. 2. Slide glass upward to remove glass from chrome grill. 3. Clean glass with a non-abrasive household glass cleaner and warm water. Gas fireplace glass cleaner can also be used. 4. Align glass with rails on chrome grill and slide glass downward into chrome grill. 5. Attach chrome grill onto reflector. Warning: Do not operate unvented room heater without glass/ chrome grill attached to reflector. To Remove Pilot From Main Burner Assembly 1. Turn OFF gas supply to the heater. 2. Turn OFF electrical supply to the heater if optional blower, SRB-18T or SRB-30T is installed in heater. 3. Remove lower louver from casing assembly (2 screws). 4. Remove reflector from casing assembly (2 screws). 5. Disconnect pilot tubing from pilot (see Figure 12, Page 12). Grasp nut Awith a wrench when removing nut B with a second wrench. 6. Remove pilot from pilot bracket (2 nuts). 7. As parts are being replaced in reverse order, check for gas leaks at all gas connections before lower louver is replaced onto casing assembly. To Remove Main Burner Orifice From Main Burner Assembly 1. Turn off gas supply to the heater. 2. Turn off electrical supply to the heater if optional blower, SRB-18T or SRB-30T is installed in heater. 3. Remove lower louver from casing assembly (2 screws). 4. Remove reflector from casing assembly (2 screws). 5. Disconnect supply tubing from orifice holder. 6. Remove orifice holder from venturi of main burner assembly. 7. Remove main burner orifice from orifice holder. 8. As parts are being replaced in reverse order, check for gas leaks at all gas connections before lower louver is replaced onto casing assembly. To Remove Gas Valve From Casing Assembly 1. Turn OFF gas supply to the heater. 2. Turn OFF electrical supply to the heater if optional blower, SRB-18T or SRB-30T is installed in heater. 3. Remove lower louver from casing assembly (2 screws). 4. Remove reflector from casing assembly (2 screws). 5. Remove upper louver from casing assembly (2 screws). 6. If installed, remove optional blower assembly (4 screws). 7. Disconnect inlet supply tubing, outlet supply tubing, pilot supply tubing and thermocouple lead from gas valve. 8. If heater is attached to wall, disconnect gas supply line from inlet regulator. 9. Remove heater from wall. 10. Remove gas valve bracket from casing assembly (4 screws to be removed are located on casing assembly back). 11. Remove hydraulic thermostat bulb from the...

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